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BY 4fwATToRNEYs 1 (No Model.) 2 Sheets-Sheet 2.

L. V. THOMAS. INGANDESGENT LIGHT.

No. 567,520'. y Patented Sept. 8, "189.

M ATTORNEYS f UNITED STAT-Es PATENT OFFICE.

LOUIS VICTOR THOMAS, OF PARIS, FRANCE.

SPECIFICATION fori-ning part f Letters Patent No. 567,520, dated September 8, 1896. Application filed September 28, 1895. Serial No. 563,998. (Nc model.) Patented in France May 25,1895, No. 247,688.

To all whom it may concern:

Beit known that I, LOUIS VICTOR THOMAS, a citizen of the Republic of France, residing in Paris, France, have invented certain Improvements in Oil-Lamps Burning with an Incandescent Light, (for which I have obtained a French patent, dated May 25, 1895, No. 247,6S8,)'0f which the following is a specitication.

This invention relates to improvements in oil-lamps burning with an incandescent light.

A lamp constructed according to my invention is provided with a burner for volatilizing the oil and mixing the vapor with air, so as to produce a blue iiame burning at a high n temperature and capable of rendering a 1n an- .the vertical axis of the burner.

,upper ends of these tubes.

` of a small pipe a is fixed.

tle or like body incandescent, as has been effected hitherto with the gas Bunsen burner.

The construction of the burner is exceedingly simple and will be described with reference to the accompanying drawings.

Figure l is a vertical section taken through Fig. 2 is a vertical section at right angles to Fig. l. Fig.

3 is a horizontal section taken on the line 1 2, Fig. l. Fig. 4. is a horizontal section on the line 3 4, Fig. 2; and Figs. 5, 6, and 7 relate to a modiiied form of burner.

In the figures, A and A are cylindrical tubes opening laterally toward their upper ends into an annular chamber B and extending at their lower ends into a reservoir C, containing the oil. Wicks in the said tubes A A cause the oil to rise by capillary attraction toward the In one of these tubes or in the annular chamber B one end Thesaid pipe is coiled around the burner proper, B', in which is the annular chamber B, descends vertically to the under side of a platinum plate P, where it is turned up, and projects in the form of a jet b through a central opening provided in the said plate. Into the axis of the burner B opens a tube d, which extends downwardly, terminating at its lower end in a cap d', covering the'j et b', the distance between the lower end of the cap and the platinum plate being sufficient to allow for the passage of air to be mixed with the gas which escapes from jet b', as hereinafter described. This distance can be regulated by sliding the cap d on the tube d. `On the upper end of the burner B is a ized.

metal gauze cap c, preferably convex" or bulged. The burner is provided with a gallery E for carrying the chimney, and is surmounted by a mantle or the like F, of'suitable composition, which is rendered incandescent by the heat from the burner-dame. The mantle-support g may be iixed to the gallery E by clamping the saine against a lugo or in any other suitable manner.

On the platinum plate P is mounted a rod extending outside the gallery and terminating in an operating key or button carrying at its center part a small plate p, which can be lowered onto the jet b for causing the extinguishing of the burner.

In order to light the burner, the tubes A A are heated, for example, by a plug soaked in alcohol and ignited, so as to cause the oil to rise in the said tube and become volatil- In a short time enough vapor has been generated to allow of the said vapor issuing by the jet At from the tube ct to be ignited.

The heat generated by the jet b warms the annular chamberB and the pipe a, which surrounds it, causing the volatilization ofthe oil,

which passes out at once under pressure.

The vapor under pressure takes with it a certain amount of air, with which it mixes, and is then burned above the metal gauze cap c with a blue flame, which still morevhighly heats the chamber B and the pipe a, surrounding it on the outside. In this pipe a the complete and absolute volatilization of the oil is secured. The heat from the llame is such that the mantle F is at once brought to a state of incandescence, producing a white light of very considerable illu minating power. The lamp is extinguished by merely lowering the plate p onto the jet b', as already described. Y

In the modification shown in vertical sections in Figs. 5 and 6 and in horizontal section in Fig. 7 the wick-tubes Aand A', opening upwardly into the annular chamber B and extending downwardly into the oil-reservoir O, are again employed, as well asthe burner BQ with perforated top c, the small tube a, the tube b, and the jet or nozzle b. The main difference consists in the fact that the pipe 0L, instead of surrounding the burner B', as hereinbefore described, is surmountedby a chamber D, which, being placed in the IOO midst of the flame, secures the volatilization of the oil. A small pipe b descends from this chamber, terminating at its other end in the nozzle 0r jet b. In all other respects the parts are similar to those already described with reference to Figs. 1, 2, 3, and't. On the gallery E a sleeve d, opening longitudinally on the side of the tubes A A', is provided, in which by means of abutton or key e a tube f, inclosing a wick which may be im-I pregnated with alcohol, may be operated, constituting a preliminary heating device.

I do not limit myself to the precise forms or dimensions of the burners which I have described nor to the metal of which the various parts are constructed, and it will be understood that the lamp may be of any desired form and constructed of any suitable material.

What I claim is- 1. In an incandescent oil-lamp, the combination of an oil-reservoir, an annular chamber near the burner and a wick to take the oil 4from the reservoir to the annular chamber, with a passage leading from the annular chamber and passing upward to be heated by the flame of the lamp itself, and then bent downward, a central mixing-chamber into 3. In an incandescent oil-lamp, the combination of an oil-reservoir, an annular chamber near the burner and a wick to take the oil from the reservoir to the annular chamber, with a passage leading from the annular chamber and passing upward to be heated by the iiame of the lamp itself, and then bent downward, a central mixing chamber, a sleeve carried by the gallery of the lamp, and a tube adapted to work in the sleeve and to carry a wick saturated with alcohol, all substantially as and for the purposes setI forth.

4E. In an incandescent oil-lain p, the combination of an oil-reservoir, an annular chamber near the burner and a wick or wicks to take the oil from the reservoir to the annular chamber, with a passage leading from the annular chamber, and passing through the flame of the burner, and a central mixingchamber into which the said passage opens, all substantially as and for the purposes set forth.

5. In an incandescent oil-lamp, the combination of an oil-reservoir, an annular chamber near the burner and a wick 0r wicks to take the oil from the reservoir to the annular chamber, with a passage leading from the annular chamber and heated by the iiame of the lamp itself, a platinum plate and a central mixing-chamber above the plate and adjustable nearer to or farther from the said plate, the said passage opening into the said mixing-chamber, all substantially as and for the purposes specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS VICTOR THOMAS. vifitnesses:

LEON FRANcKENs, GLYDE SHROPSHIRE. 

